1427 Sigma J Eng & Nat Sci 38 (3), 2020, 1427-1445 Research Article CYCLIC BEHAVIOR OF COMPOSITE COLUMN-REINFORCED CONCRETE BEAM JOINTS Fethi ŞERMET 1 , Emre ERCAN 2 , Emin HÖKELEKLİ 3 , Bengi ARISOY* 4 1 Iğdır University, Civil Engineering Department, IĞDIR; ORCID: 0000-0001-8221-689X 2 Ege University, Civil Engineering Department, İZMİR; ORCID: 0000-0001-9325-8534 3 Bartın University, Civil Engineering Department, BARTIN; ORCID: 0000-0003-0548-5214 4 Ege University, Civil Engineering Department, İZMİR; ORCID: 0000-0002-2785-0609 Received: 31.12.2019 Revised: 11.05.2020 Accepted: 13.06.2020 ABSTRACT In this paper, behavior of the concrete encased steel profile composite column-reinforced concrete beam connection representing interior beam-to-column joints under cyclic loading is presented. The column was designed as concrete encased I steel profile composite column according to Eurocode 4; beam was designed as regular reinforced concrete beam according to local building codes. The finite element model of the beam- to-column joint was implemented in ABAQUS and numerical analysis was validated by full scale experimental study. The performance of the concrete encased steel profile composite column-reinforced concrete beam joint was compared to reinforced concrete beam-to-column joint, in order to observe the load carrying capacity and ductility. Ductility level and failure type of the joints were studied and performance of connections are compared. Comparisons were made using load-displacement relation and failure mechanism. It is found that the concrete encased steel composite column-reinforced concrete beam joint exhibited slightly ductile behavior relative to reinforced concrete column-beam joint. On the other hand, analysis result show that the failure controlled by behavior of the beam and joint capacity is depend on the shear capacity of the beam. Keywords: Reinforced concrete joints, composite columns, cyclic loading, finite element modeling. 1. INTRODUCTION In reinforced concrete moment resisting frames, joints are designed as rigid connection and it is expected that the joints allow the members (beams and columns) adjoining in joint to develop and sustain their ultimate capacity. Under seismic loading, the demand of ductile behavior of the joint is increased and adequate strength and stiffness of the joint to resist the internal forces induced by the framing members should be provided. On the other hand, the beam-to-column joints are the most critical sections in the reinforced concrete frame systems under seismic loading. In earthquake resistant building design, it is intended that the beam-to-column joints are to consume the earthquake loads by deformations. In this approach, the ductility of the structure is one of the most important parameters. A ductile structure maintains its strength in spite of the fact that the elements make plastic deformations under the effect of earthquake loads. In order to * Corresponding Author: e-mail: [email protected], tel: (232) 311 51 81 Sigma Journal of Engineering and Natural Sciences Sigma Mühendislik ve Fen Bilimleri Dergisi
CYCLIC BEHAVIOR OF COMPOSITE COLUMN-REINFORCED CONCRETE BEAM JOINTS
Jun 20, 2023
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